Simulation of ductile fracture in pipeline steels under varying constraint conditions using cohesive zone modeling

Parmar, Shreya; Bassindale, Chris; Wang, Xin; Tyson, W. R.; Xu, Su

doi:10.1016/j.ijpvp.2018.03.003

Cited by 14 publications

(2 citation statements)

References 12 publications

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“…Despite the difference in loading mode, the CTOA values between DWTT and pipe are very similar, which lends credibility to the use of the CZM for practical modelling applications. These results agree with the findings of Parmar et al10 and Moon et al11 ; however, this work extends those results by predicting fracture velocity and CTOA. The ability to produce numerical results using the relatively simple CZM that agrees with both small scale (DWTT) and large scale (pipe) geometries lends confidence to the procedure and offers potential for significant advance in the development of a CTOA-based approach to crack arrest.…”

supporting

confidence: 93%

On the transferability of CTOA from small‐scale DWTT to full‐scale pipe using a cohesive zone model

Bassindale

Wang

Tyson

et al. 2021

Fatigue Fract Eng Mat Struct

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supporting

confidence: 93%

On the transferability of CTOA from small‐scale DWTT to full‐scale pipe using a cohesive zone model

Bassindale

Wang

Tyson

et al. 2021

Fatigue Fract Eng Mat Struct

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“…For fine-scale studies, micromechanical modelling using a variety of failure criteria can be performed. The computational demands of the analyses vary considerably, with two-dimensional approaches using a cohesive zone or CTOA model being least demanding (see, for example, Parmar et al 47 ) and a full three-dimensional treatment using micromechanical fracture criteria (for example, Simha et al 48 ) being the most demanding. Some examples of FEA analyses involving CTOA are discussed here.…”

Section: Fea Simulationsmentioning

confidence: 99%

Characterization of stable ductile crack propagation by CTOA: Review of theory and applications

Tyson¹,

Newman

Xu³

2018

Fatigue Fract Eng Mat Struct

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Fracture toughness is a crucial material property in structural design with metallic materials. For resistance against crack initiation, the crack‐tip opening displacement (CTOD) (or, equivalently, the J integral) is well established. For resistance against crack extension, the “resistance curve” (J as a function of crack size) may be used for limited amounts of crack growth. However, for crack increments much larger than the material thickness, the most useful criterion for toughness characterization is the crack‐tip opening angle (CTOA). During the past three decades, standards have been introduced to enable reproducible measurement of CTOA. Simultaneously, improved computer‐aided photographic methods have been developed to measure surface CTOA during the fracture process, and analysis of the mechanics of bend specimens has enabled deduction of the CTOA from load and displacement. Elastic‐plastic finite‐element analyses using a constant‐CTOA fracture criterion have been used to simulate fracture of laboratory specimens and structural components and to transfer the properties measured from laboratory‐scale specimens to structural applications. This paper reviews the state of the art in measurement and application of CTOA.

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Comments on CTOA transferability in “Crack tip opening angle during unstable ductile crack propagation of a high-pressure gas pipeline” [204 (2018) 434–453]

Bassindale

Williams

et al. 2019

Engineering Fracture Mechanics

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Simulation of ductile fracture in pipeline steels under varying constraint conditions using cohesive zone modeling

Cited by 14 publications

References 12 publications

On the transferability of CTOA from small‐scale DWTT to full‐scale pipe using a cohesive zone model

On the transferability of CTOA from small‐scale DWTT to full‐scale pipe using a cohesive zone model

Characterization of stable ductile crack propagation by CTOA: Review of theory and applications

Comments on CTOA transferability in “Crack tip opening angle during unstable ductile crack propagation of a high-pressure gas pipeline” [204 (2018) 434–453]

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